From: Niklas Haas <g...@haasn.dev> Invalid input files may contain film grain metadata which survives ff_h274_film_grain_params_supported() but does not pass av_film_grain_params_select(), leading to a SIGSEGV on hevc_frame_end().
Fix this by duplicating the av_film_grain_params_select() check at frame init time. An alternative solution here would be to defer the incompatibility check to hevc_frame_end(), but this has the downside of allocating a film grain buffer even when we already know we can't apply film grain. Fixes: https://trac.ffmpeg.org/ticket/10951 --- libavcodec/hevcdec.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) diff --git a/libavcodec/hevcdec.c b/libavcodec/hevcdec.c index 727b02f0f40..d3b668af00e 100644 --- a/libavcodec/hevcdec.c +++ b/libavcodec/hevcdec.c @@ -2893,10 +2893,15 @@ static int hevc_frame_start(HEVCContext *s) !(s->avctx->export_side_data & AV_CODEC_EXPORT_DATA_FILM_GRAIN) && !s->avctx->hwaccel; + ret = set_side_data(s); + if (ret < 0) + goto fail; + if (s->ref->needs_fg && - s->sei.common.film_grain_characteristics.present && - !ff_h274_film_grain_params_supported(s->sei.common.film_grain_characteristics.model_id, - s->ref->frame->format)) { + ( s->sei.common.film_grain_characteristics.present && + !ff_h274_film_grain_params_supported(s->sei.common.film_grain_characteristics.model_id, + s->ref->frame->format)) + || !av_film_grain_params_select(s->ref->frame)) { av_log_once(s->avctx, AV_LOG_WARNING, AV_LOG_DEBUG, &s->film_grain_warning_shown, "Unsupported film grain parameters. Ignoring film grain.\n"); s->ref->needs_fg = 0; @@ -2910,10 +2915,6 @@ static int hevc_frame_start(HEVCContext *s) goto fail; } - ret = set_side_data(s); - if (ret < 0) - goto fail; - s->frame->pict_type = 3 - s->sh.slice_type; if (!IS_IRAP(s)) -- 2.44.0 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
